Office (OLE) / .XLS malware analysis — malicious · aa855d7e6ebe57b5

MALICIOUS

Office (OLE) / .XLS

332.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 255d862434cc434f008b08911671e229 SHA-1: d0105a766126028af24ebf415b78d54f3905a812 SHA-256: aa855d7e6ebe57b546a719d3699b2c004a4ba00ee6810d0e9bc5a0759e734430

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file contains an Excel 4.0 macro (XLM) with an Auto_Open function, which is a known technique for executing malicious code upon opening the document. The macro utilizes ShellExecute and dangerous functions like RUN, indicating an intent to download and execute a payload from the embedded URL. The presence of an embedded URL further supports this conclusion.

Heuristics 4

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN

Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL https://dtmh.gr/ds/231120.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `56028e1aaff784c0ad7279a6790acbda557776a958b2dd9faa77c4f8894b8439`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	6064 bytes

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